gcc/testsuite/gcc.c-torture/compile/pr39824.c

   1 static const double internalEndianMagic = 7.949928895127363e-275;
   2 static const unsigned char ieee_754_mantissa_mask[] = { 0x00, 0x0F, 0xFF, 0xFF,
   3     0xFF, 0xFF, 0xFF, 0xFF };
   4 static inline int
   5 trio_isnan (double number)
   6 {
   7   int has_mantissa = 0;
   8   unsigned int i;
   9   unsigned char current;
  10   for (i = 0; i < (unsigned int)sizeof(double); i++)
  11     {
  12       current = ((unsigned char *)&number)[(((unsigned char
  13                                               *)&internalEndianMagic)[7-(i)])];
  14       has_mantissa |= (current & ieee_754_mantissa_mask[i]);
  15     }
  16   return has_mantissa;
  17 }
  18 void
  19 xmlXPathEqualNodeSetFloat(int nodeNr, double v)
  20 {
  21   int i;
  22   for (i=0; i<nodeNr; i++)
  23     if (!trio_isnan(v))
  24       break;
  25 }
  26